Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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AlTACHMENT AND CABLE FASTENING DEVICE
BACKGROUND OF THE INVENTION
The invention concerns particularly the technical industry for
attachment and fastening devices similar to the type used for luggage elastic, rubber
shock absorbers, chest expanders... (sometimes hereinafter referred to as elastic
c~rd.
There are different versions of elastic shock cords and similar devices for
attachment, fastening, or hanging from an elastic cable that has at least one extremity
connected to an instrument type hook.
An example is the elastic shock cord in which the cable extremities are
simply equipped with a ring that has been crimped, whose extremities are thereafter
lodged into the shaft of the hook.
Under another version, the hook-end extremity forms a ring crimped on
the extremity of the cable, which all together can ultimately be covered with a suitable
plastic material.
While these types of popular elas~iacords are often times satisfactory,
they nonetheless do not exhibit a considerable resistance to traction. Indeed, when
there is more than 66-132 pounds (30 to 60 kilograms) of traction, either the hook
opens because it is made of ordinary steel, or the connector cable-ring or cable-hook
breaks.
In order to improve the quality of these elastic cords, I thought about
placing a buckle at the extremities of the cable, and crimping the ring or the hook-end
extremity behind this buckle. In this manner, the increased traction strength, if
substantial, would be enough to specifically comply with the new security standards,
for example in the areas of methods of holding cart merchandise or maintenance
garage rack tools.
The attachment and fastening device, under the invention, is in
accordance with these criteria in that it allows for traction effort in excess of
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220 pounds (100 kilograms) in a cable composition that is similar to its predecessors.
One way to achieve these ends is that the attachment and fastening
device includes a combination of a buckle on the cable extremity crimped with a
metallic ring, a sturdy solid metallic hook fastened on the end to work with thebuckle on the cable, and a covering of the entire crimped buckle and hook with aplastic material made of good mechanical elements.
Another way to increase the device's traction resistance is that the
metallic hook is made of steel made of good mechanical elements that can undergoan appropriate surface treatment, or the hook can also be made with a flat plane or
ovoid section, or the plastic covering material can even be of a ~einforced resin.
Under the invention, we also tried to get a good handle on the
attachment and fastening device, without the risk of fingers slipping under the
traction strain. Therefore, the entire device is covered with and composed of
ergonomical properties, and in particular by an enlargement where the hook begins
which continues along its two large sides.
Those characteristics and others will emerge in the following
description.
BRIEF DESCRIPTION OF THE DRAWINGS
To determine the purpose of the invention without thereby limiting it,
in the pictures attached:
- Figure 1 is a perspective view which separately illustrates the end
buckle of the cable and the metallic hook of the invention.
- Figure 2 is a side view showing the end buckle of the cable assembled to
the metallic hook.
- Figure 3 is a cut view illustrating the covering of the entire end metallic
buckle-hook.
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- Figure 4 is an exterior view similar to Figure 3.
- Figure S is a blueprint view corresponding to Figure 4.
- Figure 6 is a cut longitudinal view following lines 6 to 6 of Figure 3.
- Figure 7 is a cut transversal view following lines 7 to 7 of Figure 3.
-Figure 8 illustrates a variation model of the device according to the
invention, in particular the molded hook.
-Figure 9 illustrates another variation model in which the security
attachment works with the free end extremity of the hook.
DETAILED DESCRIPTION OF THE INVENTION
In order to give more concrete details about the invention's purpose, we
now describe it in a manner not limited to what is illustrated in the drawings.
The principal goal is to put together an assembly that is very resilient to
traction; the tests showed that in order to obtain worthwhile results, we need to
combine several solutions that we describe hereinafter below:
First of all, at the e~lrelluty or at both extremities of a cable (C), ~rerel ably
but not necessarily composed of several elastomer blen~le-l fibers coated with a textile
girdle, of the type named sandow elashc cord, a buckle (C1) is created that is crimped
with a surrounding metallic ring (1) by crushing the two fibers of the cable behind the
buckle (Figure 1).
In the eyelet (C2) of the buckle is the bended end extremity (2a) of a hook
(2) in metallic fiber (Figure 2), then the entire buckle (C1) - hook (2) is covered with a
plastic material (3).
As we can see in Figure 3, the very close connection between the plastic
coating material, the independent hook and the crimped buckle
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of the cable helps in large part to improve the traction resistance as compared to the
classic assemblies mentioned above.
In order to increase more the traction resistance, we also forsee the
creation of the hook (2) made of good steel mechanical elements with eventually a
surface quenching treatment followed by a tempering, thereby avoiding the opening
of the active part (2b) of the hook due to heavy exertion. We can also create the hook
with a flat plane (2c) or ovoid section as shown in Figure 7.
The covering (3) constituting a molding, can also be accomplished with
resin which increases even more the traction resistance.
This covering extends across a part of the massive rear (3a) surrounding
mostly the curved end (2a) of the hook, the buckle (Cl) and the crimping ring (1), then
a part (3b) in a hook shape surrounding the hook (2) and its counter part (2b) and,
eventually a flexible security attachment (3c) coming from the massive rear (3a),
opposite the hook start (3b) and spreading out in alignment with the free extremity of
the active part of the hook, leaving between them a space for passing of the element
onto which must attach the invention device.
To avoid any unreasonable slipping of the user's fingers under the
traction strain, I also foresaw to create the massive part (3a) of the covering into an
ergonomic shape, specifically, as we can see on Figures 4, 5 and 6, with some lateral
bulge (3al-3a2) at the hook's start level and following at least its two big sides. These
bulges constitute natural abutments for the thumb and index finger which become
lodged into the cavities or depressions (3a3 - 3a4) thereby formed at the rear of the
bulges.
For certain uses, it is necessary to arrange the massive part (3a) of the
covering in support of or very close to a surface and to anchor the hook below the said
surface.
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In order to do this, I foresaw as illustrated on Figure 8 to reverse the
direction of the active part of the hook (2b-3b), which is thus moved forward ascompared to the massive part (3a), instead of being in its prolongation.
In another variation illustrated on Figure 9, the security attachment (3c)
coming from the molding is relatively rigid and introduces at its free extremity a
hook shape (3c.1) to blend with the free extremity of the molded hook (3b) thereby
creating an additional hooker. (3b.1).
The advantages are seen from the description. I _ underline once again
that there has been a very significant increase of traction resistance due to the
combination of the links between the cable and hook, and to the materials utilized, as
well as the good control of the attachment devices with ergonomical forms that were
judiciously conceived.
